| /** |
| * Licensed under the Apache License, Version 2.0 (the "License"); |
| * you may not use this file except in compliance with the License. |
| * You may obtain a copy of the License at |
| * |
| * http://www.apache.org/licenses/LICENSE-2.0 |
| * |
| * Unless required by applicable law or agreed to in writing, software |
| * distributed under the License is distributed on an "AS IS" BASIS, |
| * WITHOUT WARRANTIES OR CONDITIONS OF ANY KIND, either express or implied. |
| * See the License for the specific language governing permissions and |
| * limitations under the License. |
| */ |
| package org.apache.aurora.common.util; |
| |
| import org.easymock.IMocksControl; |
| import org.junit.After; |
| import org.junit.Before; |
| import org.junit.Test; |
| |
| import static org.easymock.EasyMock.createControl; |
| import static org.easymock.EasyMock.expect; |
| import static org.hamcrest.CoreMatchers.is; |
| import static org.junit.Assert.assertThat; |
| |
| /** |
| * @author William Farner |
| */ |
| public class SamplerTest { |
| |
| private IMocksControl control; |
| |
| private Random random; |
| |
| @Before |
| public void setUp() throws Exception { |
| control = createControl(); |
| |
| random = control.createMock(Random.class); |
| } |
| |
| @After |
| public void verify() { |
| control.verify(); |
| } |
| |
| @Test |
| public void testThresholdWorks() { |
| for (int i = 0; i <= 100; i++) { |
| expect(random.nextDouble()).andReturn(0.01 * i); |
| } |
| |
| control.replay(); |
| |
| Sampler sampler = new Sampler(25, random); |
| |
| for (int i = 0; i <= 100; i++) { |
| assertThat(sampler.select(), is(i < 25)); |
| } |
| } |
| |
| @Test(expected = IllegalArgumentException.class) |
| public void testRejectsNegativePercent() { |
| control.replay(); |
| |
| new Sampler(-10, random); |
| } |
| } |